By combining computer vision, machine learning algorithms and sensors, the online retail giant can tell what people have purchased and charges their Amazon account. If someone puts an item back, they aren’t charged.

As the Reuters news service puts it, “Cash registers and checkout lines become superfluous – customers are billed after leaving the store using credit cards on file.”

The store is not without employees – Amazon says there will be people there making food, stocking shelves and helping customers. The store will offer ready-to-eat breakfasts, lunches, dinners, and snacks, as well as some grocery staples like bread, milk, cheese and chocolates. It’ll also have Amazon Meal Kits.